Introduction to wide area networks

So what, exactly, is it makes something a wide area network (WAN) instead of a local area...
Wireless Implementation Guidelines

Wireless Implementation Guidelines

As we have an article for the overview of the wireless security considerations, let’s talk about planning...

Wireless security and Implementation considerations

Understanding the threatsIntroducing wireless networking into your organization opens the door to three new...

The 802.11 standards family

Now that you have a foundational understanding of RF signals, we can move to the 802.11 standards....

Cisco’s Wireless Technologies

The funny thing about wireless LAN (WLANs) is that the topology was just so cool that network...

Enabling Internet connectivity with NAT

We can still remember the very first time we saw Network Address Translation (NAT) in action. “This...
context based access controla

Context-based Access Control (Cisco IOS Firewall)

You’ve got to have the Cisco IOS firewall set in the IOS to make use of Context-based Access...
Advanced Access lists - CCNA Course

Advanced Access lists – CCNA Course

In this article, we are going to show you some more advanced ways to use access lists....

Extended Access Lists – CCNA Course

In the standard IP access list example, you can notice how you have to block all access...
standard access lists ccna course

Standard Access Lists – CCNA Course

Standard IP access lists filter network traffic by examining the source IP address in a packet. You create...
Introduction to Access Lists

Introduction to Access Lists

An Access list is essentially a list of conditions that categorize packets. They can really help when...
Configuring VLAN Trunking Protocol ccna course

Configuring VLAN Trunking Protocol (VTP)

All Cisco switches are configured to be VTP servers by default. To configure VTP, first, you have...
Configuring voice VLANs

Configuring voice VLANs – CCNA Course

The voice VLAN feature enables access ports to carry IP voice traffic from an IP phone. When a...
configuring inter vlan routing

Configuring Inter-VLAN Routing

By default, only hosts that are members of the same VLAN can communicate. To change this and...
Configuring Virtual Local Area Networks (VLANs)

Configuring Virtual Local Area Networks (VLANs)

It may come as surprise to you, but configuring VLANs is actually pretty easy. Figuring out which...
vlan identification methods

VLAN Identification Methods – CCNA Course

Most of the time, VLANs are created by a sys admin who proceeds to assign switch ports...
introduction to virtual area network vlan

Introduction to Virtual Local Area Network (VLAN)

The following figure shows how layer 2 switched networks are typically designed as flat networks. With this configuration,...
troubleshooting basic switch connectivity

Troubleshooting Basic Switch Connectivity – CCNA Course

As always, when troubleshooting connectivity issues, use a layered approach and eliminate possibilities at each layer to...
enhancements to stp

Enhancements to Spanning Tree Protocol (STP)

The 802.1d spanning tree protocol was created with very few design flaws; however, as with most great...
initial switch configurations

Initial Switch Configurations – CCNA Course

Catalyst switches, for the most part, are designed so that the default state of the switch allows...
layer 2 switching and stp

Layer 2 Switching and Spanning Tree Protocol (STP)

We already have an article “Datalink networking concepts”, that you can use bridges and switches to segment...
eigrp configurations

EIGRP Configuration – CCNA Course

One of the greatest aspects of EIGRP is that you get all this advanced functionality with minimal...
balanced hybrid operations eigrp

Balanced Hybrid operations – CCNA Course

Balanced hybrid routing protocols are sometimes called advanced distance vector routing protocols. The rationale behind this logic...
configuring ospf with sdm

Configuring OSPF with SDM

With all these configurations we have learned in our previous article for OSPF we have encountered so...
introduction to configuring ospf

Introduction to configuring OSPF – CCNA Course

One of the first steps you should take when configuring OSPF is to configure loopback interfaces to...
open shortest path first ccna course

Open Shortest Path First (OSPF) – CCNA Course

The most widely used link-state routing protocols today is an IETF standard routing protocol called Open Short...
Link state and hybrid routing protocol

Link State and Hybrid Routing Protocols

Distance vector routing protocols are ideal for small networks that have routers with slow processing power and...
conifiguring RIP with sdm

Configuring RIP with SDM – CCNA Course

RIP configuration using SDM are relatively similar and just as easy as configuring default and static routes....
distance vector routing protocol

Distance vector routing protocols

The preceding chapter looked at distance vector routing protocols from a sort of high altitude overview. This...
route summerization in cisco networking

Route summarization in Cisco Networking

As already mentioned, classful routing protocols automatically summarized networks to the classful subnet boundaries. Classless routing protocols,...